Water-cooled stirring-shaft for roasting-furnaces.



PATENTED AUG'. 13, 1907. P. M. PATITZ.

W. J. BECKER & I w. 0. 1320mm, GUARDIAN or w. .r. nnoxnn, AN mam rmzson.WATER GOOLED STIRRING SHAFT FOR ROASTING FURNACES APPLIOATION FILED IAY16, 1904.

FIG.1

lV/TNESSES: XfaaAM,

UNITED STATES PATENT oEEIoE.

WILLIAM J. BECKER AND JOHANN FRIEDRICH MAX PATITZ, OF MILWAUKEE,WISCONSIN; WILLIAM C. BECKER GUARDIAN OF SAID WILLIAM J. BECKER, ANINSANE PERSON; SAID PATITZ ASSIGNOR TO ALLIS-CHALMERS COMPANY, OFMILWAUKEE, WISCONSIN, A COR- PORATION OF NEW JERSEY.

Specification of Letters Patent.

Patented Aug. 13, 1907.

Application filed May 16, 1904- Serial No. 208,287.

To all whom it may concern:

Be it known that we, WILLIAM J. BECKER and J OHANN FRIEDRICH MAx PATIIZ,citizens of the United States, residing at Milwaukee, in the county ofMilwaukee and State of Wisconsin, have invented certain new and usefulImprovements in Water-Cooled Stirring-Shafts for Roasting-Furnaces, ofwhich the following is a specification.

Our invention relates to water cooled stirring shafts for roastingfurnaces.

The object of the invention is to provide a simple construction by whichthe shaft may be properly and effectively cooled without the addition ofunnecessary parts to the construction.

The invention is described in the following specification andillustrated in the accompanying drawing, in which,

Figure 1 is a section through the center of the shaft and stirring arm.Fig. 2 is a horizontal section through the stirrer arms on the line C,D. Fig. 3 is a section on the line A, B. Fig. 4 is a section on acentral plane on the upper part of the stirring shaft showing the wateradmission port. Fig. 5 is a horizontal section through the shaft andarms where three arms are used. Fig. 6 is a similar section with fourarms.

The shaft is constructed as follows: In order to avoid the use ofpiping, a central partition 1 is cast into the shaft 2, as shown. Thiscentral partition is closed on top at one side, as shown in Fig. 4 at 3.The inlet pipe 4 leads into a chamber above the inlet 5 through thestuffing box, as shown. The partition at the points where the stirrerarms are attached extends through to the interior of the shaft. Thestirrer arms are likewise divided by longitudinal partitions 6, which,however, do not extend entirely through the arm but end a short distancefrom the end of the arm, thus providing an opening 7 for the passage ofthe water. The central partitions of the arms abut against the centralpartitions of the stirrer shaft, and packing may be provided if desired,although an ordinary joint will generally be sufficient. The waterissues through the outlet pipe 8.

The circulation in the shaft is as follows: Entering through 4, thewater passes between the inside of the shaft and the central partitionto the bottom of the shaft which is closed, as shown. The water musttherefore pass through the stirrer arms, around the central partitions6, through the openings 7, to the other side of the shaft 9, thenpassing upwardly and out through the pipe 8. It will be noted that theflow of water to the arms is direct from the shaft in each case, thatis, each arm receives water directly from one of the shaft compartments.This, in other words, permits of a flow to the arms in multiple, thusavoiding the flow of water as to either a feeding compartment oranexhaust compartment of the shaft, from one arm to another arm.

Fig. 5 shows the means employed when three stirrer arms are used. Inthis figure the two right hand com partments are open to the supply. Theleft hand compartment is open to the outlet. The water circulation is asshown by the arrows. From the upper right hand compartment the waterpasses through the upper arm around to its partition and again throughthe arm to the left hand compartment and thence to the outlet. From thelower right hand compartment it passes first through the lower armaround its partition and again through the arm to the left handcompartment and thence to the outlet and second, through the right handarm around its partition and again through the arm and thencethroughpipe 10 to the left hand compartment and outlet.

Fig. 6. In this case, opposite diagonal compartments are open to inletor outlet respectively, and the water passes, for instance, through theright hand side of the lower arm, the lower side of the right hand arm,around the respective partitions to the outlet; and likewise from theupper end of the left hand arm, around the partition to the outlet, andsimilarly through the top arm. It will thus be seen that every part ofthe shaft and arms is thoroughly cooled in either construction. Fivearms could be employed if desired, and proper water connections made toprovide circulation.

One great advantage of this improved water cooling is that the coldwater comes in direct contact with the heated surfaces; whereas whenpiping is used, the pipes must first be cooled, which is a direct loss.An other advantage is the simplicity of construction, as the partitionsare cast directly into the parts Having thus described our invention,what we claim as new and desire to secure by Letters Patent is:

1. A water cooled stirring shaft, a stirrer arm extend ing therefrom,vertical partitions forming passages through the shaft and arm andconnections for permitting a flow of water through the passages.

2. In a water cooled stirring shaft and arms, vertical partitionstherein, and connections permitting a flow of water therethrough inmultiple.

In testimony whereof we affix our signatures in pres ence of twowitnesses.

WILLIAM J. BECKER.

JOI-IANN FRIEDRICH MAX PA'IITZ.

Witnesses W. G. STARKWEATI-IER, ELLA BRICKELL.

